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net: hns3: clear command queue's registers when unloading VF driver 

According to the hardware's description, the driver should clear
the command queue's registers when uloading VF driver. Otherwise,
these existing value may lead the IMP get into a wrong state.

Fixes: fedd0c15d2 ("net: hns3: Add HNS3 VF IMP(Integrated Management Proc) cmd interface")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Huazhong Tan 2019-02-20 10:32:51 +08:00 committed by David S. Miller
parent 232d0d55fc
commit 34f81f049e
1 changed files with 20 additions and 0 deletions
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20
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c
View File

@ -362,8 +362,28 @@ int hclgevf_cmd_init(struct hclgevf_dev *hdev)
return 0;
}
static void hclgevf_cmd_uninit_regs(struct hclgevf_hw *hw)
{
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_BASEADDR_L_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_BASEADDR_H_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_DEPTH_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_HEAD_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CSQ_TAIL_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_BASEADDR_L_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_BASEADDR_H_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_DEPTH_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_HEAD_REG, 0);
hclgevf_write_dev(hw, HCLGEVF_NIC_CRQ_TAIL_REG, 0);
}
void hclgevf_cmd_uninit(struct hclgevf_dev *hdev)
{
spin_lock_bh(&hdev->hw.cmq.csq.lock);
spin_lock(&hdev->hw.cmq.crq.lock);
clear_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state);
hclgevf_cmd_uninit_regs(&hdev->hw);
spin_unlock(&hdev->hw.cmq.crq.lock);
spin_unlock_bh(&hdev->hw.cmq.csq.lock);
hclgevf_free_cmd_desc(&hdev->hw.cmq.csq);
hclgevf_free_cmd_desc(&hdev->hw.cmq.crq);
}